/*
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation;
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 * Author: Vikas Pushkar (Adapted from third.cc)
 */

#include "ns3/applications-module.h"
#include "ns3/basic-energy-source.h"
#include "ns3/core-module.h"
#include "ns3/csma-module.h"
#include "ns3/internet-module.h"
#include "ns3/mobility-module.h"
#include "ns3/netanim-module.h"
#include "ns3/network-module.h"
#include "ns3/point-to-point-module.h"
#include "ns3/simple-device-energy-model.h"
#include "ns3/ssid.h"
#include "ns3/wifi-radio-energy-model.h"
#include "ns3/yans-wifi-helper.h"

using namespace ns3;

NS_LOG_COMPONENT_DEFINE("WirelessAnimationExample");

int
main(int argc, char* argv[])
{
    uint32_t nWifi = 20;
    CommandLine cmd(__FILE__);
    cmd.AddValue("nWifi", "Number of wifi STA devices", nWifi);

    cmd.Parse(argc, argv);
    NodeContainer allNodes;
    NodeContainer wifiStaNodes;
    wifiStaNodes.Create(nWifi);
    allNodes.Add(wifiStaNodes);
    NodeContainer wifiApNode;
    wifiApNode.Create(1);
    allNodes.Add(wifiApNode);

    YansWifiChannelHelper channel = YansWifiChannelHelper::Default();
    YansWifiPhyHelper phy;
    phy.SetChannel(channel.Create());

    WifiHelper wifi;

    WifiMacHelper mac;
    Ssid ssid = Ssid("ns-3-ssid");
    mac.SetType("ns3::StaWifiMac", "Ssid", SsidValue(ssid), "ActiveProbing", BooleanValue(false));

    NetDeviceContainer staDevices;
    staDevices = wifi.Install(phy, mac, wifiStaNodes);
    mac.SetType("ns3::ApWifiMac", "Ssid", SsidValue(ssid));

    NetDeviceContainer apDevices;
    apDevices = wifi.Install(phy, mac, wifiApNode);

    NodeContainer p2pNodes;
    p2pNodes.Add(wifiApNode);
    p2pNodes.Create(1);
    allNodes.Add(p2pNodes.Get(1));

    PointToPointHelper pointToPoint;
    pointToPoint.SetDeviceAttribute("DataRate", StringValue("5Mbps"));
    pointToPoint.SetChannelAttribute("Delay", StringValue("2ms"));

    NetDeviceContainer p2pDevices;
    p2pDevices = pointToPoint.Install(p2pNodes);

    NodeContainer csmaNodes;
    csmaNodes.Add(p2pNodes.Get(1));
    csmaNodes.Create(1);
    allNodes.Add(csmaNodes.Get(1));

    CsmaHelper csma;
    csma.SetChannelAttribute("DataRate", StringValue("100Mbps"));
    csma.SetChannelAttribute("Delay", TimeValue(NanoSeconds(6560)));

    NetDeviceContainer csmaDevices;
    csmaDevices = csma.Install(csmaNodes);

    // Mobility

    MobilityHelper mobility;
    mobility.SetPositionAllocator("ns3::GridPositionAllocator",
                                  "MinX",
                                  DoubleValue(10.0),
                                  "MinY",
                                  DoubleValue(10.0),
                                  "DeltaX",
                                  DoubleValue(5.0),
                                  "DeltaY",
                                  DoubleValue(2.0),
                                  "GridWidth",
                                  UintegerValue(5),
                                  "LayoutType",
                                  StringValue("RowFirst"));
    mobility.SetMobilityModel("ns3::RandomWalk2dMobilityModel",
                              "Bounds",
                              RectangleValue(Rectangle(-50, 50, -25, 50)));
    mobility.Install(wifiStaNodes);
    mobility.SetMobilityModel("ns3::ConstantPositionMobilityModel");
    mobility.Install(wifiApNode);
    AnimationInterface::SetConstantPosition(p2pNodes.Get(1), 10, 30);
    AnimationInterface::SetConstantPosition(csmaNodes.Get(1), 10, 33);

    Ptr<BasicEnergySource> energySource = CreateObject<BasicEnergySource>();
    Ptr<WifiRadioEnergyModel> energyModel = CreateObject<WifiRadioEnergyModel>();

    energySource->SetInitialEnergy(300);
    energyModel->SetEnergySource(energySource);
    energySource->AppendDeviceEnergyModel(energyModel);

    // aggregate energy source to node
    wifiApNode.Get(0)->AggregateObject(energySource);

    // Install internet stack

    InternetStackHelper stack;
    stack.Install(allNodes);

    // Install Ipv4 addresses

    Ipv4AddressHelper address;
    address.SetBase("10.1.1.0", "255.255.255.0");
    Ipv4InterfaceContainer p2pInterfaces;
    p2pInterfaces = address.Assign(p2pDevices);
    address.SetBase("10.1.2.0", "255.255.255.0");
    Ipv4InterfaceContainer csmaInterfaces;
    csmaInterfaces = address.Assign(csmaDevices);
    address.SetBase("10.1.3.0", "255.255.255.0");
    Ipv4InterfaceContainer staInterfaces;
    staInterfaces = address.Assign(staDevices);
    Ipv4InterfaceContainer apInterface;
    apInterface = address.Assign(apDevices);

    // Install applications

    UdpEchoServerHelper echoServer(9);
    ApplicationContainer serverApps = echoServer.Install(csmaNodes.Get(1));
    serverApps.Start(Seconds(1.0));
    serverApps.Stop(Seconds(15.0));
    UdpEchoClientHelper echoClient(csmaInterfaces.GetAddress(1), 9);
    echoClient.SetAttribute("MaxPackets", UintegerValue(10));
    echoClient.SetAttribute("Interval", TimeValue(Seconds(1.)));
    echoClient.SetAttribute("PacketSize", UintegerValue(1024));
    ApplicationContainer clientApps = echoClient.Install(wifiStaNodes);
    clientApps.Start(Seconds(2.0));
    clientApps.Stop(Seconds(15.0));

    Ipv4GlobalRoutingHelper::PopulateRoutingTables();
    Simulator::Stop(Seconds(15.0));

    AnimationInterface anim("wireless-animation.xml"); // Mandatory
    for (uint32_t i = 0; i < wifiStaNodes.GetN(); ++i)
    {
        anim.UpdateNodeDescription(wifiStaNodes.Get(i), "STA"); // Optional
        anim.UpdateNodeColor(wifiStaNodes.Get(i), 255, 0, 0);   // Optional
    }
    for (uint32_t i = 0; i < wifiApNode.GetN(); ++i)
    {
        anim.UpdateNodeDescription(wifiApNode.Get(i), "AP"); // Optional
        anim.UpdateNodeColor(wifiApNode.Get(i), 0, 255, 0);  // Optional
    }
    for (uint32_t i = 0; i < csmaNodes.GetN(); ++i)
    {
        anim.UpdateNodeDescription(csmaNodes.Get(i), "CSMA"); // Optional
        anim.UpdateNodeColor(csmaNodes.Get(i), 0, 0, 255);    // Optional
    }

    anim.EnablePacketMetadata(); // Optional
    anim.EnableIpv4RouteTracking("routingtable-wireless.xml",
                                 Seconds(0),
                                 Seconds(5),
                                 Seconds(0.25));         // Optional
    anim.EnableWifiMacCounters(Seconds(0), Seconds(10)); // Optional
    anim.EnableWifiPhyCounters(Seconds(0), Seconds(10)); // Optional
    Simulator::Run();
    Simulator::Destroy();
    return 0;
}
